CONTENTS

 1     Scope
 2     References
        2.1     Normative references
        2.2     Informative references
 3     Terms and definitions
        3.1     General definitions
        3.2     Mechanical characteristics
        3.3     Mode field characteristics
        3.4     Glass geometry characteristics
        3.5     Chromatic dispersion definitions
        3.6     Other characteristics
 4     Abbreviations and acronyms
 5     Test methods
        5.1     Test methods for the mode field diameter
                  5.1.1     Reference test method: The far-field scan
                  5.1.2     First alternative test method: The variable aperture technique
                  5.1.3     Second alternative test method: The near-field scan
                  5.1.4     Third alternative test method: Bidirectional backscatter difference
        5.2     Test methods for the cladding diameter, core concentricity error and cladding non‑circularity
                  5.2.1     Reference test method: The near-field image technique
                  5.2.2     First alternative test method: The refracted near-field technique
                  5.2.3     Second alternative test method: The side-view technique
                  5.2.4     Third alternative test method: The transmitted near-field technique
        5.3     Test methods for the cut-off wavelength
                  5.3.1     Reference test method for the cut-off wavelength (λ_c) of the primary coated fibre and reference test method for the cut-off wavelength (l_cj) of jumper cables: The transmitted power technique
                  5.3.2     Alternative test method for λ_c: The split-mandrel technique
                  5.3.3     Reference test method for the cut-off wavelength (λ_cc) of the cabled fibre: The transmitted power technique
                  5.3.4     Alternative test method for the cut-off wavelength (λ_cc) of the cabled fibre
        5.4     Test methods for the attenuation
                  5.4.1     Reference test method: The cut-back technique
                  5.4.2     First alternative test method: The backscattering technique
                  5.4.3     Second alternative test method: The insertion loss technique
        5.5     Test methods for the chromatic dispersion
                  5.5.1     Reference test method: The phase-shift technique
                  5.5.2     First alternative test method: The interferometric technique
                  5.5.3     Second alternative test method: The pulse delay technique
        5.6     Test methods for prooftesting
                  5.6.1     Reference test method: Longitudinal tension
Appendix I – Methods of cut-off wavelength interpolation
        I.1        Limited negative error method
        I.2        Least squares method
Appendix II – Test method for measuring chromatic dispersion uniformity  based on the backscattering technique
       II.1     General
       II.2     Test apparatus
                 II.2.1     General considerations (as in 5.4.2.2.1)
                 II.2.2     Optical source (as in 5.4.2.2.2)
                 II.2.3     Optical coupling system (as in 5.4.2.2.3)
                 II.2.4     Branching device (as in 5.4.2.2.4)
                 II.2.5     Optical detector (as in 5.4.2.2.5)
                 II.2.6     Amplifier (as in 5.4.2.2.6)
                 II.2.7     Signal processor (as in 5.4.2.2.7)
                 II.2.8     Cladding mode stripper (as in 5.4.2.2.8)
                 II.2.9     Reference fibre
       II.3     Measurement procedure
       II.4     Presentation of the results
       II.5     References